tomato soup from campbell's. it's amazing what soup can do. good morning, turtle. ♪ my friends are all around me ♪ my friends, they do surround me ♪ ♪ i hope this never ends ♪ and we'll be the best of friends ♪ ♪ all set? all set. [ male announcer ] introducing the reimagined 2013 chevrolet traverse, with spacious seating for up to eight. imagine that. >>> they are all bracing for serious sibling rivalry at the super bowl. one the coach of the san francisco 49ers and the other couch of the baltimore ravens. here is cnn's john berman. >> wolf, it is brother against brother this sunday. what everyone is calling the har-bowl. how will it turn out for them? well, maybe there are some lessons. we decided to look back at pretty much all of the famous brothers in history. >> jim harbaugh. >> john harbaugh. >> coach, jim, john harbaugh, harbaugh. >> we've had a few fights, a few arguments, just like all brothers. >> like first brothers, meet cain, meet abel, see cain, kill abel. >> justice is a team sport. >> what does that mean? >> it m